<template>
  <!-- 登录页面的整体盒子 -->
  <div class="login-container" >
    <!-- 登录的盒子 -->
    <el-card>
      <!-- 标题的盒子 -->
      <div class="title-box"></div>
      <!-- 登录的表单区域 -->
      <el-form :model="loginForm" :rules="loginRules" ref="loginFormRef" >
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" placeholder="请输入用户名" maxlength="10" minlength="1" @keyup.native.enter='handelLogin()' v-focus></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            type="password"
            placeholder="请输入密码"
            maxlength="15"
            minlength="6"
            show-password
            @keyup.native.enter='handelLogin()'
          ></el-input>
        </el-form-item>
        <el-form-item>
          <el-button type="primary" @click="handelLogin">登录</el-button>
          <el-link type="info" @click="$router.replace('/register')">去注册</el-link>
        </el-form-item>
      </el-form>
    </el-card>
  </div>
</template>

<script>
import { loginAPI } from '@/api/Login.js'
import { mapMutations } from 'vuex'
export default {
  name: 'Login',
  data() {
    return {
      // 登录的表单对象
      loginForm: {
        username: '',
        password: ''
      },
      // 登录的表单验证规则对象
      loginRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { pattern: /^[a-z\d]{2,10}$/i, message: '用户名必须是2-10的字母数字', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { pattern: /^\S{6,15}$/, message: '密码必须是6-15的非空字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    ...mapMutations('userModule', ['setToken']),
    // 登录
    handelLogin() {
      // 整体校验
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) return
        // 1.发起登录请求
        const {
          data: { code, message, token }
        } = await loginAPI(this.loginForm)
        // 2.登录失败
        if (code !== 0) return this.$message.error(message)
        // 3.登陆成功
        this.$message.success(message)
        this.setToken(token)
        // replace无法回退,push可以回退
        this.$router.replace('/')
        console.log(token)
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login-container {
  background: url('~@/assets/images/login_bg.jpg') center;
  background-size: cover;
  height: 100%;

  .el-card {
    width: 400px;
    height: 320px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    padding: 0 30px;
    box-sizing: border-box;

    .title-box {
      height: 60px;
      background: url('~@/assets/images/login_title.png') center no-repeat;
    }

    .el-button {
      width: 100%;
    }
  }
}
</style>
